I had that question as well; the answer is on the main page under protected buttons.
This extension’s basic version has some of its buttons protected (some nested commands handling core functionality are hidden). You still get fully functional extension and can freely modify or delete any buttons or commands, attach your own triggers etc.
You can purchase a premium version of this extension if you're interested in how it was coded or want to make custom modifications.
I do not provide support for a premium version if you decide to edit any previously locked button commands."